EF5 tornado drought reaches 11 years, longest in history yahoo.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from yahoo.com Daily Mail and Mail on Sunday newspapers.
Eleven years after a tornado devastated Moore, Okla., it remains the most recent tornado to be rated EF5, the strongest possible rating. The 11-year gap is the longest since official U.S. records began in 1950.
It's been a record-long time since the last EF5 tornado, meaning one with wind gusts over 200 mph. But the danger of violent tornadoes hasn't gone away.